Blue-print frame.



J. A. HIRSCHBBRG 6v J. W. HARTLIBB.

BLUE PRINT FRAME. APPLIOATION FILED 001:26, 1912.

UNITED STATES PATENT OFFICE.

JOHN A. H'IRSOHBERG AND JULIUs W. vlIMRTLIEB, oF NEW YORK, N. Y.

BLUE-PRINT FRAME.

Specification of Letters Patent.

Patented Oct. 14:, 1913.

Y '0' alt lwhom t may concern.'

Be it known that we, JOHN A. HIRsOH- BERG and J ULiUs W. HARTLIEB,citizens of the United States, and residents of the city of N ew York,borough of Manhattan, in the county and State of New York, have inventeda new and Improved Blue-Print Frame, of which the following is a full,clear, and exact description. l 4

This invention relates to appliances for making blue prints or the like,and has particular reference to a frame or holder for the drawings ortracings to be reproduced, the same comprising a main frame adapted tohold the usual glass plate and other accessories, and in connectiontherewith the use of clamping means in the nature of a plurality. ofbinding strips associated with the side and end members of the mainframe and adapted to fold inwardly simultaneously adjacent the inneredge of the frame into cooperation with the said accessories.

The primary object of this invention is to l so mount said bindinglstrips upon the main frame and operativel1 make them all operabiyesimultaneously by a single movement of an actuating member'.

A further object `of this invention is to facilitate the .mani ulationof large frames of the character re erred to whereby a great amount oftime now commonly Wasted is savedin the placing of work into or removingthe same from a large frame, and the labor incident thereto ismaterially reduced.`

The foregoing vand other objects of this invention will be hereinafterfullyl describedl and claimed and illustrated in the drawingsaccompanying this specification in which' like characters of referenceindicate corresponding parts in all the views, and in whichu Figure 1 isa plan view of one embodiment of the invention shown as applied to aprinting framein the position it occupies whenl being manipulated; thatis to say, with thev back or the side opposite the glass plate up-Lward; Fig. 2 is a transverse sectional detail substantially'on the line2-2 of Fig. 1; and Fig. 3 is a detail of the actuator and locking means.

Referring particularly to the drawings,

we show at 10 a frame of an suitable size,

the same being provided wit an inwardly projectingl flange 11 adapted toreceive and support t e usual glass plate 12 adJacent to which the workto be reproduced and thc connect them as to sensitized paper are to besecured by any suitable means including, for example, a layer of felt 13and a flexible impervious diaphragm 14. According to the usual practice,this diaphragm is made of rubber or rubber composition, and is fittedwith a nipple 15 towliich air exhausting means of any suitable naturemay be applied for the purpose of withdrawing the air from between thesame and the glass plate,y whereby the ordinary atmospheric pressureoperating upon the outsides of the diaphragm and the lass plate willinsure the intimate contact etween the. work and the inner face of theglass plate. l

In operations as heretofore carried on with mechanism .of the naturealready set forth, it is customary to employ an auxiliary fra-Ine forthe purpose of securing the margin or edge of the diaphragm intosubstantially air-tight contact with the edge of the glass platedirectly opposite the flange 11. Such auxiliar frames, however, used inconnection with ilarge printing frames are exceedingly heavy andnecessitate the use of overhead hoisting tackle for the purpose oflifting and shifting them preparatory to the loading of a frame or inthe subsequent removal of the work therefrom. Not only is such 'anauxiliary frame heavy and unwieldy, but in order to provide reliablemeans to secure it in place for the purpose set forth, the meansheretofore proposed have been very slow and otherwise unsatisfactory.We, therefore, employ a series of binding strips 16 on the sides andends of the main frame which take the place of the heretofore proposedauxiliary frame. Each of these strips is independent of all the otherswith respect, to its construction, but we employ nieans for supportingand operating said strips ,whereby they will all movesimultaneously'into locking position, and accordingly a single lockingmeans may be employed to secure them in such position in any convenientmanner.

As a pract-'cal embodiment of suitable means for operating the severalbinding 4strips, we provide as man rock shafts 17.

Each strip 16 is rigidly sesuitable number of arms Q0 connected by l thepart of a single operator without the means of set screws or the like 21to the shaft, whereby upon rotation of the rocky shaft the stripconnected thereto will be positively moved through the arc of a circleinto or out of closed position. The cap 19 is cut away as indicated at19 for the accommodation of the arms 2O as they swing outwardly.

As suitable means for connecting the rock shafts for simultaneousoperation, we provide between each two of them a pair of niiter gears22, said gears being rigidly connected to the shafts. One of the shaftsis extended, as indicated at 17', so as to project beyond the mainframe, and to it is connected an actuator shown in the form of a lever23 whereby the shaft to which it is connected may be operated in eitherdirection and hence the corresponding operation of all of the. shaftswill result. A ratchet 24 is shown secured to the shaft extension 17 andis adapted to be locked by means of a spring actuated pawl 25 so as tolock the binding strips 16 in cont-act with the diaphragm.

When it is desirable, each of the strips 16 may be faced on the sideadjacent the diaphragm with a pad 26 of felt or other suitable material,whereby a more satisfactorycoperation with the diaphragm may be had anddamage to the diaphragm will be prevented.

The operation of the device may be briefly set forth as follows: Withthe frame in the position indicated in Fig. 1, in order to open the samefor the reception or removal of the work, the actuator 23 is grasped soas to permit the pawl 25 to be thrown out-v wardly ont of engagement andthe actuator is then swung through an'arc of substantially 90 degrees,causing the rock shafts ,and strips 1G to swing upwardly and around theaxes of the rock shafts so that they will substantially occupy theposition indicated in Fig. 2. In this position the binding strips willbe well out. of the way of the diaphragm 14 and the other accessoriescooperating with the glass plate. `When the parts are properly placedupon the glass plate and it is desired to lock the diaphragm 1n placefor the purpose above set forth, a reverse movement of the actuator 23will cause all of the binding strips 16 to swing into normal positionwhere they will be locked by operation of the pawl and ratchet. It willthus appear that the operation is not only a very simple one, but thelocking effect is thoroughly reliable. lit is to be noted also in thisconnection that it is a physically easy matter to manipulate thisappliance on use of any auxiliary hoisting apparatus.

The several parts of this device may be made of any suitable materialsand the relative sizes and proportions and also the number of attachingarms may be varied according to the work to be performed o-r the desireof the user without departing from the spirit of the invention.

Having thus described our invention, we claim as new and desire tosecure by Letters Patentz 1. The herein described blue print framecomprising, in combination with a main frame and the usual printingaccessories, a plurality of binding strips associated wit-h therespective sides and ends of the frame, and means to simultaneouslyswing said strips through arcs of circles into or out of contact withsaid accessories.

2. ln a blue print frame, the combination with a main frame having aflange and the usualvpriiiting accessories supported upon said flange,of a series of independently constructed binding strips associated withthe respective side and end members of the main frame and adapted tocoperate with said accessories, a rock shaft jonrnaled upon each framemember, means connecting each binding strip to the adjacent rock shaft7and means connecting the several rock shafts for simultaneous movement,substantially as set fort-h.

3. In a blue print frame, the combination with a main frame having sideand end members and means associated therewith for supporting work, of aplurality of independently constructed binding strips associated withthe respective side and end members and operative normally adjacent theinner edges thereof, a rock shaft journaled within each of the mainframe members, arms rigidly secured to each binding strip and alsosecured to the adjacent rock shaft.

the frame members being provided with eiltouts to accommodate said arms,means connecting all of the shafts-for simultaneous operation wherebythe binding strips will be swung` into or out of engagement with thework holding means, said' shaft connecting means including beveledgears, and means to lock the binding strips in firm contact with thework.

l'n testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.V`

JHN A. HIRSCHBERG. j llllLllUS W'. Hllt'lLlllEl. `\Vi/'itnesses:

Gino. L. Benina, Pintar D. Romaans.

